Automatic cut-off valve.



T: GEE.

AUTOMATIC CUP-OFF VALVE- APPucATmN HLED mm. H. 19$8.

1,26,53G Patentmi Dec. 3, L918.

r snrns PATENT onnio 1 'IEACYQVGEE, or CHESTER, MoNrAnA.

AUTOMATIC CUT-OFF VALVE;

To mag concern; v

Be it known that I, TRACY GEE, a, citizen of V the United 'States,residing at Chester, in

the county of Hill and Stateof Montana, have invented icertain newfanduseful Improvements in 'Automatic- Cut-Ofli-Valves,

- T of which the; following is a specification,

I reference being .h'ad jto the accompanying drawings;

7 'Thisinventlon' relates to certain improvements in automatic cut-offvalves and has relation more pa rtlcularly to a dev1ce of thls generalcharacter: especially designed and adapted for use in connectionwithconduits through-which flow gas or other fluid under pressure, and it isan object of the inventlon to provide a device of'this general characterhaving novel and improved means whereby the valve will assume{automatically the closed position when the pressure of the flow dropsbelow a predetermined degree; 1

, It is also an object of the invention'to provide a novel and improveddevice of this general'zcharacter which comprises a pres-'- sure chamberinterposed within a conduit and which chamber is provided withadiaphragm normally maintainedextended under the influence of thepressure within the I conduit together With" a valve normally s0 1 enceof the controlling memberresting upon maintained inopen position underthe influthe diaphragm and which serves to release the valve upon thedropping of the dia-' 5 hereinafter be definitely claimed.

Inorder thatmy invention may be the phragm'so that said valve may assumeautomatically the closed position.

The invention consists in the details of construction and inthecombination and ar, rangementof the several parts of my im- 1 provedautomatic cut-off valve whereby certain important advantages areattained and the device rendered simpler; less expensive and otherwisemore convenient and advane tageous foruse, as will be hereinafter morefully set forth.

The .novel features of my invention will better understood, I will nowproceed to describe the same with reference to the accompanyingdrawings, wherein:

Figure 1 is a view in side elevation illustrating an automatic cut-offvalve constructed in accordance with an embodiment of my invention;

Fig. 2 is a longitudinal vertical sectional view taken thr u h thestructure "Shown in Specification of Letters Patent. Patented Dec. 3,1918. A Application fi led March 11, 1918. seriaiivo. 221,762.

Fig. s s N w in at plan of my irnproved valveas herein'setforth;and v Fg. efis a fragmentary view in perspec tive of the outer end portionlofthe stem from which the weighted member is ,sus

pended. I I A As disclosed in the accompanying drawr ings' C denotes apressure chamber of pre determined configuration and dimension andhaving its upper face open and provided at its opposite ends with theports Qwhereby said chamber may be interposed withinQ-a conduitorservice pipe through which flows a fluid under pressure, such as ga's.Dis posed 'over the open or top face of the chamer C' is afle'xible'diaphragm-3 normally maintained expanded or elevated under the influenceof the pressure of the fluid within the chamber C Also overlyingItheupper or open face of the chamber C is a removable cape having itsintermediate portion substantially concavo-convex inorder to pro vide acompartment or chamber A outwardly of the diaphragm 3. The centralportion of the cap 4 is provided'with an opening affording communicationwithfthe chamber or compartment C and extending through said opening isa stem 5 having fixed to itslower .orinner 'end a head 6. The upwardmovement of the head 6 under the influence of the diaphragm- 3, islimited by contact of said 7 head with the marginal portion of the cap43 defining the opening 5.

The pressure chamber C is provided within a pipe section S and saidsection rear- Wardly of the chamber is provided with the upstandingbearings 7 in which is rotatably mounted a rock shaft 8 disposedtransversely of said section S. Fixed to the shaft 8 between thebearings 7 is a rock arm 9 which overlies the cap 4 and is hingedlyconnected with the outer or upper portion of the stem.

5 so that upon the rising or dropping of the head 6 the shaft 8' Will becorrespondingly rocked. Intersecting the section S in ad- -vance of thepressure chamber C is a plug valve 10 substantially horizontallydisposed and which has a stem 11 extending beyond one side of thesection S. Secured to'the outer end portion of the stem 11 is a rod 12extending forwardly of the section A' and 1 said rod is of such lengthas to extend beneath the shaft 8 when in substantially a horizontalposition. Therod 12 at a point i below the shaft 8 whenthe rod is in itssub stantially horizontal position. is provided with a weight 14 andextending forwardly from said Weight is an arm 15 terminating inaninwardly directed extension 16 adapts.

ed to overlie a beveled end portion;17;of a stem .18 extending outwardlyfrom the end of the shaft 8 and said extension 16'is en- 10 gaged withina notch ajproduc'ed in said beveled end 17 when the member'fi iselevated undertheinfluence of thediaphragm 13 and the plug valvelO is inopenlposition; -;When thepressure ithin the conduit or service pipe in.which the section S is interposed drops below a predetermineddegree thediaphragm 3 will fall Which results in'thedrop ping of, the memberd Asthe member '6- c drops the sha'ft8 i s sufllciently rocked, as to freethe extension 16 from the notch a which resultslin'the extension 16sliding from the stem l8 as' assured by. the bevel j 17 and theweight'lt. The weight 14 also assures the atively engaged with the stem18 until the pressure of the gas or other fluid within the conduit orservlce plpe' isfsufiiclent to mainsition. V H I From the foregoingdescription, it is tain the head 6 in itsupper or outward pothought ,tobe obvious that an; automatic cut-off valve constructed in accordancewith my invention, is particularly Well adapted foruse by reasonof theconvenience and facility with which it may be assembled and operated andit illalso be obvious that my invention issusceptible of some change-and'modification' without departing from the principles and spirit thereofand. for this :.-reason I'do not wishto be understood as limiting myselfto the precise arrangement and formation of the several parts herelntice except as hereinafter claimed.

The 'comblnation with a service pipe pro shown in carrying out myinvention in prac vided with a pressure chamber, a Wallo'fd; c merihavingf'eni p n g n -o" munication with the: atmosphere, a flexible daphragm ntersect ng f S iLlCl pressure chfam her, a valvearranged-"Within the service pipe and having afrotary stem, a weighted;arm carried by the stern'of' the valve, a member resting upon thediaphragm, a stem car rled thereby and extending exteriorly of thepressure chamberfljth'rough the opening in I a wall of said chamber, arock shaft sup-. portedgby the'pipe and'having a beveled'end providedwith a] notch, and an upstanding arm carried by the arm of'the stem andengageable within the notch ofthe'rock shaft, the outward movement ofthe stem'being limited by contact of the member with the.

marginal 7 portion of the 'chamber defining the opening. '1 In te o ywhereof I hereunto I aflix signature in the j pre'sence of two}witnesses.

, v "@ITRACY GEE.

Witnes'sesi A. F. B RUss',

M-fP- Copies of this patent may be obtained. for five cents each, byaddressing th' Commissioner of Patents, 1 Washington,33.6 i l i

